Length of one loop of B-DNA:
1. 3.4 nm.
2. 0.34 nm.
3. 20 nm.
4. 10 nm
Which of the following is correct about H-bonding in nucleotide:
1. A–T G–C
2. A–G T–C
3. G–T A–C
4. A–A T–T
If the DNA percentage of thymine is 20%, then what is the percentage of guanine?
1. | 20% | 2. | 40% |
3. | 30% | 4. | 60% |
Chargaff's rule states that in an organism:
1. | The amount of adenine (A) is equal to that of thymine (T) and the amount of guanine (G) is equal to that of cytosine (C). |
2. | The amount of adenine (A) is equal to that of guanine (G) and the amount of thymine (T) is equal to that of cytosine (C). |
3. | The amount of adenine (A) is equal to that of cytosine (C) and the amount of thymine (T) is equal to that of guanine (G). |
4. | Amounts of all bases are equal. |
During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide sequence in the mRNA would be:
1. TCTGG
2. UAUGC
3. UATGC
4. TATGC
The following ratio is generally constant for a given species:
1. | T + C / G + A | 2. | G + C / A+ T |
3. | A + C / T + G | 4. | A + G / C +T |